YouTuber 'JegStuffoInfo' here calls it 'troll high-fiving', which essentially means that you high five people while they're offering up their open palms to the sky. Tonnes of fun, we can all agree.

And if this little prank-a-thon has piqued your interest in such childish activities, here's our video gallery of professional prankster Remi Gaillard doing his thing, starting off with this ludicrously popular 'Real-Life Mario Kart' video.